Question

1. which organisms are pathogens? select all that apply.

lactobacillus bacteria in yogurt
streptococcus bacteria
toxoplasma gondii
varicella-zoster virus

Explanation:

• Streptococcus bacteria: Can cause strep throat, pneumonia, etc.
• Toxoplasma gondii: A parasite that can cause toxoplasmosis.
• Varicella - zoster virus: Causes chickenpox and shingles.
• Lactobacillus bacteria in yogurt: These are probiotics (beneficial bacteria), not pathogens.

Answer:

Streptococcus bacteria, Toxoplasma gondii, varicella - zoster virus.